Practise the skill, then beat your score.

Fast addition, subtraction, multiplication and division using simple numbers and no calculator.

Rapid number sequences and fraction-to-decimal questions designed for mental calculation.

Solve short workplace and business problems using profit, rates, percentages, tables and numerical data.

Six-minute adaptive permutation game. Two rows contain the same four symbols in a different order. An operator such as 2413 means: take the 2nd symbol first, then the 4th, then the 1st, then the 3rd. Worked example: if the top row is ■ ◆ ▲ + and the bottom row is ◆ + ■ ▲, the operator is 2413. Correct answers move you up a level; wrong answers move you down. Higher levels can hide one operator in a two-step transformation.

Use the keyboard: press ← or → to match the centre arrow. Ignore the outer arrows. If crosses surround the centre arrow, press Space instead.

Mixed abstract-reasoning questions: figure series, missing panels, 3×3 matrices, analogies and odd-one-out problems using multiple simultaneous visual rules.

Fast cross-discipline engineering fundamentals, covering mechanics, electricity, thermal energy, fluids, materials, measurement and simple systems.

Spot errors in units, revisions, requirements, measurements, data and technical records without relying on one engineering discipline.

Choose the safest and most professional response to discipline-neutral engineering situations involving evidence, uncertainty, quality and change.